Hach 3400 Serie Manual Del Usuario página 17

Warning list for sensors
A warning does not affect the operation of menus, relays and outputs. A
warning icon flashes and a message is shown on the bottom of the
measurement screen. To show the sensor warnings, press the MENU key
and select Sensor Diag, [Select Sensor], Warning List. A list of possible
warnings is shown in Table 7.
Table 7 Warning list for conductivity sensors
Warning Description
ZERO TOO HIGH The zero calibration
value is >300,000 counts
ZERO TOO LOW The zero calibration
value is < –300,000
counts
TEMP TOO HIGH The measured
temperature is > 100 °C
TEMP TOO LOW The measured
temperature is < 0 °C
CAL OVERDUE The Cal Reminder time
has expired
NOT The sensor has not been
CALIBRATED calibrated
REPLACE The sensor has been in
SENSOR operation > 365 days
CAL IN A calibration was started
PROGRESS but not completed
OUTPUTS ON During calibration, the
HOLD outputs were set to hold
for a selected time.
Resolution
Make sure that the sensor is held
in air during zero calibration and is
not located near radio frequency
or electromagnetic interference.
Make sure that the cable is
shielded by metal conduit.
Make sure that the sensor is
configured for the correct
temperature element.
Calibrate the sensor.
Calibrate the sensor.
Calibrate the sensor with a
reference solution and reset the
sensor days. Refer to Sensor
diagnostic and test menu
on page 16. If the calibration fails,
call technical support.
Return to calibration.
The outputs will become active
after the selected time period.
Table 7 Warning list for conductivity sensors (continued)
Warning Description
WRONG LINEAR The user-defined linear
TC temperature
compensation is out of
range
WRONG TC The user-defined
TABLE temperature
compensation table is
out of range
Event list for sensors
The event list shows current activities such as configuration changes,
alarms, warning conditions, etc. To show the events, press the MENU key
and select Sensor Diag, [Select Sensor], Event List. A list of possible
events is shown in Table 8. Previous events are recorded in the event log,
which can be downloaded from the controller.
Table 8 Event list for conductivity sensors
Event Description
CAL READY The sensor is ready for calibration
CAL OK The current calibration is good
TIME EXPIRED The stabilization time during calibration expired
CAL FAIL The calibration failed
CAL HIGH The calibration value is above the upper limit
K OUTRANGE The cell constant K is out of range for the current
calibration
UNSTABLE The reading during calibration was unstable
CHANGE IN CONFIG float The configuration was changed—floating point type
CHANGE IN CONFIG text The configuration was changed—text type
CHANGE IN CONFIG int The configuration was changed—integer value type
Resolution
The value must be between 0 and
4%/°C; 0 to 200 °C.
The temperature is above or
below the temperature range
defined by the table.
English 17